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Page 76
Mini-AT User Guide
Event Logger Lock Jumper
Pins 9 & 10 of Jumper Block 24 (JB24) provides a hardware requirement when attempting to lock the Event
Logger through software. A jumper across pins 9 & 10 is required to allow host software to set the ‘lock’
condition for Item Code 149. By default, the jumper is removed.
Be sure to read and understand the restrictions involved before attempting to configure the Event
Logger Lock. Once the Event Logger is ‘Locked’, the jumper may be permanently removed.
The function of the Event Logger is to record: Date, Time, UserID#, assigned Sequence Number, Before Value
and After Value for changes made to instrument parameters. By default, the Event Logger is ‘unlocked’,
meaning old event records begin to be overwritten after 500 event changes. The Event Logger Lock is a feature
that can only
be enabled through software if a jumper is across pins 9 & 10 of JB24. Once enabled (Locked),
the functionality of the Event Log conforms to Canadian regulations as specified by Measurement Canada.
Several key Canadian requirements include:
•
Units shipped to Canada will be factory configured with the Event Logger ‘Locked’.
•
After the Event Logger Lock is selected, the ‘Lock’ is permanent, i.e. it cannot be changed back to
“Unlocked”
•
When the maximum number of event records stored in memory is reached (500), the Event Log
information must be downloaded to a computer before any additional instrument changes are permitted
•
Events records are
automatically numbered sequentially starting at zero
•
Only changes to instrument parameters that can affect “Billing” are recorded in the ‘Locked’ Event
Logger, all other parameters are not recorded.
JB24
(with jumper on pins 9 & 10)
1 3 5 7 9
2 4 6 8 10
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